Home sharing Issue

I have my Windows PC to home share to my Apple TV, but the past few days the ATV has not been able to load my library. I have gotten it to work twice by resetting my router, but if I go out and stop playing it won't load again. I have every thing up to date. Only thing I haven't done is reset the ATV back to factory settings. It has worked for months and now all of a sudden it doesn't see it. Any help or ideas are appreciated. Thank you.